Forest Thrush
Turdus lherminieri
The forest thrush is 25 to 30 cm (9.8 to 12 in) long and weighs about 100 g (3.5 oz). The sexes have the same plumage. Adults of the nominate subspecies T. l. lherminieri have a mostly warm brown head with thin white lines on the cheeks and ear coverts and a wide yellow eye-ring. Their upperparts, wings, and tail are also warm brown. Their underparts are whitish with buff-edged dark brown scallops. They have a yellow iris, bill, and legs and feet. Voice: The forest thrush usually sings from a hidden perch. Its song is "oft, musical, clear notes". Its calls include a "sharp chuk or chuk-chuk".
ID text from Wikipedia, CC BY-SA 4.0

Plumbeous-backed Thrush
Turdus reevei
The plumbeous-backed thrush is 23 to 24 cm (9.1 to 9.4 in) long and weighs 61 to 66 g (2.2 to 2.3 oz). The sexes have almost the same plumage. Adult males have a mostly bluish slate-gray head with a dark-streaked white throat. Female's heads are slightly browner. Both sexes have bluish slate-gray upperparts, wings, and tail. They have a white crescent below the streaked throat, a pale gray breast that becomes white on the belly and vent, and an orange-buff wash on the flanks. Both sexes have a white to bluish white iris, a pale yellow bill, and pale yellow legs and feet. Voice: The plumbeous-backed thrush appears to sing only during the breeding season. Its song is "a fairly fast, typical Turdus caroling". Its most common call is "an abrupt and piercing, descending pseeeu". Other calls include "a ringing tseeet" and "a wheezy, rising rheet".
ID text from Wikipedia, CC BY-SA 4.0

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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Forest Thrush and Plumbeous-backed Thrush.